<template>
    <div class="wrapper" :style="{heigth:clientHeight+'px'}">
        <v-sidebar></v-sidebar>
        <v-head></v-head>
        <div class="content-box">
            <div class="content">
                <transition name="move" mode="out-in">
                    <keep-alive :include="tagsList">
                        <router-view></router-view>
                    </keep-alive>
                </transition>
            </div>
        </div>
    </div>
</template>
<script>
    import vHead from './Header.vue';
    import vSidebar from './Sidebar.vue';
    import bus from './bus';
    export default {
        data(){
            return {
                tagsList: [],
                collapse: false,
                clientHeight:0
            }
        },
        components:{
            vHead, vSidebar
        },
        created(){
            let self=this;
            self.clientHeight=document.documentElement.clientHeight;
            console.log(self.clientHeight);
            bus.$on('collapse', msg => {
                this.collapse = msg;
            })

            // 只有在标签页列表里的页面才使用keep-alive，即关闭标签之后就不保存到内存中了。
            bus.$on('tags', msg => {
                let arr = [];
                for(let i = 0, len = msg.length; i < len; i ++){
                    msg[i].name && arr.push(msg[i].name);
                }
                this.tagsList = arr;
            })
        }
    }
</script>
